GOP mayoral candidate John Catsimatidis — who claims he’s the billionaire who cares about all five boroughs — once boasted that he was a Manhattanite who felt “sorry for those people who aren’t.”

“There are two New Yorks — Manhattan and everything else,” the supermarket mogul and Upper East Side resident told Crain’s New York Business in a 1989 profile.

“I’m a Manhattanite,” he said. “I feel sorry for those people who aren’t.”

Catsimatidis made the comments in an article that noted all his grocery stores were then located either in Manhattan or the suburbs — not in Brooklyn, Queens, The Bronx or Staten Island — “reflecting his bias against opening stores in the outer boroughs.”

The remark from back then drew fire from outer-borough leaders today.

“It reflects his inner thinking,” said Republican Guy Molinari, the former Staten Island borough president and congressman. “He’s two-faced. When people run for office they change their stripes. I won’t forget it.”

Brooklyn Councilman Lew Fidler said Catsimatidis’ comment reminded him of derogatory statements that Ed Koch made about upstate New York just months before he ran for governor in 1982. Koch lost the Democratic primary to Mario Cuomo.

“Catsimatidis is going to eat those words,” Fidler said. “He’s a Manhattan elitist. It shows what he’s really thinking.”

Catsimatidis defended his comments.

“Instead of writing about a 24-year-old out-of-context quote which refers to my supermarkets, . . . The Post should be writing about Joe Lhota and his poorly worded attack on the Port Authority Police he made last week,” Catsimatidis said.

Lhota was criticized after describing the PA officers as “mall cops,” and subsequently apologized. “What John said about Manhahttan is something I’d say about Brooklyn,” said Brooklyn Borough President Marty Markowitz.

Meanwhile others defended Catsimatidis, saying he was merely showing love for his home borough.